﻿#region Apache License
//
// Licensed to the Apache Software Foundation (ASF) under one or more 
// contributor license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright ownership. 
// The ASF licenses this file to you under the Apache License, Version 2.0
// (the "License"); you may not use this file except in compliance with 
// the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#endregion

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Javax.NServlet
{

    /// <summary>
    /// A FilterChain is an object provided by the servlet container to the developer
    /// giving a view into the invocation chain of a filtered request for a resource. Filters
    /// use the FilterChain to invoke the next filter in the chain, or if the calling filter
    /// is the last filter in the chain, to invoke the resource at the end of the chain.
    /// 
    /// Since: Servlet 2.3
    /// </summary>
    /// <see cref="IFilter"/>
    /// <author>  
    ///     <a href="mailto:leopoldo.agdeppa@gmail.com">Leopoldo Lee Agdeppa III</a>
    /// </author>
    /// <date>
    /// January 2009
    /// </date>
    public interface IFilterChain
    {
        /// <summary>
        /// Causes the next filter in the chain to be invoked, or if the calling filter is the last filter
        /// in the chain, causes the resource at the end of the chain to be invoked.
        /// </summary>
        /// <param name="request">the request to pass along the chain.</param>
        /// <param name="response">the response to pass along the chain.</param>
        /// <exception cref="System.IO.IOException"></exception>
        /// <exception cref="ServletException"></exception>
        void DoFilter(IServletRequest request, IServletResponse response);
    }
}
